* {
    margin: 0;
    padding: 0;
}
.w {
    width: 1200px;
    margin: auto;
}
body {
    background-color: #f3f5f7;
    list-style: none;
}
li {
    list-style: none;
}
a {
    text-decoration: none;
}
.clearfix:before,.clearfix:after {
    content: "";
    display: table;
}
.clearfix:after {
    clear: both;
}
.clearfix {
    *zoom: 1;
}
.header {

}